Ir4+ is enriched in Ca-Al-rich inclusions in meteorites relative to the composition of the solar system.

Elemental Abundance for Iridium

Crust (CRC Handbook)

1 x 10-9

mass fraction, kg/kg

Crust (Kaye & Laby)

2 x 10-10

mass fraction, kg/kg

Crust (Greenwood)

1 x 10-9

mass fraction, kg/kg

Crust (Ahrens/Taylor)

1 x 10-10

mass fraction, kg/kg

Crust (Ahrens/Wänke)

1.02 x 10-9

mass fraction, kg/kg

Upper Crust (Ahrens/Taylor)

2 x 10-11

mass fraction, kg/kg

The Sun (Kaye & Laby)

6.0 x 10-7

atom mole fraction relative to Si=1

Solar System (Kaye & Laby)

6.6 x 10-7

atom mole fraction relative to Si=1

Solar System (Ahrens)

6.61 x 10-7 (6.1%)

atom mole fraction relative to Si=1 (% uncertainty)

Element association of Iridium in the Mineral World

This table compares the known valid mineral species listed listed with Iridium and the other elements listed based on the official IMA formula. Note that unlike other sections on this page this includes non-essential elements.

The first data column contains the total number of minerals listed with Iridium and the element listed for that row.

The second data column lists this number as a percentage of all minerals listed with Iridium.

The final data column compares this percentage against the percentage of all minerals that contain the element listed in each row.

This list of minerals containing Iridium is built from the mindat.org locality database. This is based on the number of localities entered for mineral species and is therefore slanted towards minerals interesting to collectors with less coverage of common rock-forming-minerals so it does not give an undistorted distribution of Iridium mineral species. It is more useful when comparing rare species rather than common species.